.nav_bar {
  background: black;
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  padding: 40rpx 40rpx calc(env(safe-area-inset-bottom) + 20px) 40rpx;
  justify-content: space-between;
  box-sizing: border-box;
  color: #fff;
  font-size: 36rpx;
  font-weight: 500;
  z-index: 100;
}

.warpper {
  width: 100%;
  height: calc(env(safe-area-inset-bottom) + 96px);
}
